userfaultfd: mcopy_atomic|mfill_zeropage: UFFDIO_COPY|UFFDIO_ZEROPAGE preparation

[mirror_ubuntu-artful-kernel.git] / init / Kconfig

diff --git a/init/Kconfig b/init/Kconfig
index bb9b4dd55889f0605b07ddfc73cc105d72b18908..161acd8bc56fc5cc5bcf0ecd830e9ffcfa574873 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1576,6 +1576,17 @@ config ADVISE_SYSCALLS
          applications use these syscalls, you can disable this option to save
          space.
 
+config USERFAULTFD
+       bool "Enable userfaultfd() system call"
+       select ANON_INODES
+       default y
+       depends on MMU
+       help
+         Enable the userfaultfd() system call that allows to intercept and
+         handle page faults in userland.
+
+         If unsure, say Y.
+
 config PCI_QUIRKS
        default y
        bool "Enable PCI quirk workarounds" if EXPERT